”Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues ". State the reason to explain how and why it happens?

”Our food grains such as wheat and rice, the vegetables and fruits a

1.	”Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues ". State the reason to explain how and why it happens?
Answer» ”Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues ". State the reason to explain how and why it happens?